When you scroll up and down through the data records of the dataset, you are not scrolling up and down through the rows of the DBGrid the rows are stationary while the data moves from one row to the next to give the appearance of movement.
DBGRID COMPONENT DELPHI CODE
The lines of code you'll see for that operation may be few, but they cost me hours of work! Unlike the generic grid we've used above, a DBGrid is a virtual view on the dataset-there is no relation between the number of rows shown on the screen and the number of rows of data in the dataset. While creating the output was a simple matter of adapting the code used in the record viewer component, setting the height of the grid cells ended up being a very difficult problem to solve. Notice the output of the graphics and memo fields. FIGURE 18.4: An example of the MdDbGrid component at design time. You can see an example of this grid at design time in Figure 18.4. To do this, the grid needs to make the row height resizable, to allow space for a reasonable amount of text and big enough for graphics. The goal for the next component is to enhance the DBGrid with the same kind of custom output I've used for the RecordView component, directly displaying graphic and memo fields. wrote in message I started with TWinControlĬonsider deriving your main component from TPanel or TFrame or some other.Last Updated on Wed, Besides writing brand-new custom data-aware components, it's common for Delphi programmers to customize the DBGrid control. Please help me! Also let me know if there are better ways to make such a control. The problem: when window below my component is updated, the Edit does not repaint (looks transparent).Īpparently I violate the paint message propagation. I started with TWinControl and then created inside TEdit and other elements. Hi ! I am writing a component that has multiple elements inside (edit, buttons etc). Problem with a component that has other components The IDL generated for the "of_test" function I'm calling is: Instance of "n_comtester" passing the references to "n_comtest1" and Gets references to three stateful components named "n_comtest1", I have a stateless component named "n_manager" that through createinstance() So - I am planning to make the component (apparently - derived from TPanel) with the usual properties - DataSource, DataField (for FK_CUSTOMER) and this component should process the changes of its data field (usually fk_customer) by reading addional dĪta from the query (component has DataSource property, so, this is possible to fi.Ĭomponent to component method call passing a component reference.įrom all investigation this seems like something I should be able to do, Many tables (like, carts) in my database references customer using foreign key (like carts.fk_customer) and users want to see a lot of data about customer in diferent forms. I am trying to develop Delphi DB component for displaying and editing customer data. Then I could also drag it to a place on the screen where it could useĭatabase Query and other components inside complex Delphi component
The top similar to in Delphi7 by going to View/Toolbars/Components. I managed to get the components displayed as a tabbed ribbon across I could create a VCL test app for both Delphi and C++Builder with oneīut now I am investigating this further and I find that a lot of "personality" (both Delphi and C++Builder). I installed my custom components package in the RAD Studio XE4 TheĬomponent toolbar in Delphi XE4 missing tabs and components You dont need toĬreate a Manager and Session for an intercomponent call, as the in process orbĬan verify user credentials that were passed to the root component. On intercomponent calls, and you can see SVU for an example. Is there any other way to do that? Maybe some function that gets the current To do that I had to insert the Jaguar iiop address in the calling component I have a Java component that calls methods on other Java components inside Kindly send a demo for TDBAdvgrid which is a compiled exe file.for evaluation.Ĭan not purchase till evaluation is successful. Removed (deselected ) all TMS products except TMS Gridį2051 : Unit AdvUtil was compiled with a different version of AdvStyleIF.TColorTones